Table Of Contents

MT Apply Matched Filter (Generic) (G Dataflow)

Applies a matched filter to a PAM, ASK, QAM, and PSK-modulated input waveform. The node returns the matched filtered output with a duration equal to an integer number of symbols, thus ensuring continuability from one iteration to the next.

Use MT Align To Ideal Symbols to locate and realign the matched-filtered waveform at the ideal symbol timing instant.

input complex waveform

The continuous-time modulated complex baseband waveform data.

Note

The sample rate of the input complex waveform must be an even integer multiple of the samples per symbol value. Use MT Resample (Complex Cluster) to adjust the sample rate before matched filter application.

t0

Trigger (start) time of the Y array.

Default: 0.0

dt

Time interval between data points in the Y array.

Default: 1.0

Y

The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.

matched filter coefficients

An ordered array containing sample-spaced coefficients for the desired matched filter. Wire the matched filter coefficients parameter of MT Generate Filter Coefficients to this parameter. Ensure that the value of samples per symbol matches the matched samples per symbol value used to generate the filter coefficients.

You can also specify custom
matched filter coefficients.

Note

This node does not verify the absence of intersymbol interference in custom filter coefficients before applying the matched filter.

samples per symbol

Number of samples per information symbol in the input complex waveform.

Default: 16

error in

Error conditions that occur before this node runs. The node responds to this input according to standard error behavior.

Default: no error

reset?

A Boolean that determines whether the node continues matched filtering using the previous iteration states.

TRUE

Resets the matched filtering process.

FALSE

Continues performing matched filtering from the previous iteration. Matched filtering begins from the last iteration state on subsequent calls.

Default: TRUE

output complex waveform

The output matched filtered continuous-time I/Q baseband waveform.

t0

Trigger (start) time of the Y array.

Default: 0

dt

Time interval between data points in the Y array. The reciprocal of this value is equal to the system sample rate.

Default: 1.0

Y

The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.